staging: r8188eu: Fix case where ethtype was never obtained and always be checked...

Zero-initializing ether_type masked that the ether type would never be
obtained for 8021x packets and the comparison against eapol_type
would always fail.

Reported-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/rtl8188eu/core/rtw_recv.c b/drivers/staging/rtl8188eu/core/rtw_recv.c
index 01fcabc..e305d43 100644 (file)
--- a/drivers/staging/rtl8188eu/core/rtw_recv.c
+++ b/drivers/staging/rtl8188eu/core/rtw_recv.c
@@ -551,10 +551,9 @@ static struct recv_frame *portctrl(struct adapter *adapter,
        struct sta_info *psta;
        struct sta_priv *pstapriv;
        struct recv_frame *prtnframe;
-       u16     ether_type = 0;
+       u16     ether_type;
        u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
        struct rx_pkt_attrib *pattrib;
-       __be16 be_tmp;
 
 
        pstapriv = &adapter->stapriv;
@@ -572,18 +571,16 @@ static struct recv_frame *portctrl(struct adapter *adapter,
        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
 
        if (auth_alg == 2) {
+               /* get ether_type */
+               ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
+               memcpy(&ether_type, ptr, 2);
+               ether_type = ntohs((unsigned short)ether_type);
+
                if ((psta != NULL) && (psta->ieee8021x_blocked)) {
                        /* blocked */
                        /* only accept EAPOL frame */
                        RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
 
-                       prtnframe = precv_frame;
-
-                       /* get ether_type */
-                       ptr = ptr+pfhdr->attrib.hdrlen+pfhdr->attrib.iv_len+LLC_HEADER_SIZE;
-                       memcpy(&be_tmp, ptr, 2);
-                       ether_type = ntohs(be_tmp);
-
                        if (ether_type == eapol_type) {
                                prtnframe = precv_frame;
                        } else {